14 March 2013 Measuring phonons in protein crystals
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Using Terahertz near field microscopy we find orientation dependent narrow band absorption features for lysozyme crystals. Here we discuss identification of protein collective modes associated with the observed features. Using normal mode calculations we find good agreement with several of the measured features, suggesting that the modes arise from internal molecular motions and not crystal phonons. Such internal modes have been associated with protein function.
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Gheorghe Acbas, Gheorghe Acbas, Katherine A. Niessen, Katherine A. Niessen, Deepu K. George, Deepu K. George, Edward Snell, Edward Snell, A. G. Markelz, A. G. Markelz, } "Measuring phonons in protein crystals", Proc. SPIE 8623, Ultrafast Phenomena and Nanophotonics XVII, 862305 (14 March 2013); doi: 10.1117/12.2006275; https://doi.org/10.1117/12.2006275

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